This question doesn’t suit https://android.stackexchange.com/.
Which of the low-budget (< 200€) tablet devices would you recommend as being the best compromise in terms of features and the most robust ? This is to run custom created-on-demand software (personal apps, commercial…). I am in Europe.
Nexus 7 I guess is the best under this price. It has 4 cores decent memory and I don’t think you will never need over 25 GB storage with Dropbox/GDrive/Box(50GB)/Skydrive. It has 4.1 Jellybean and